Hi Clinton,
Thank you for your reply.
I could understand that the line loopback mode is not available for the BER testing.
Can the BER testing not perform without using the line loopback?
The SRIO switches on the customer board have on individual lanes the PRBS test patterns generation and detection capability.
I guess that the BER testing can perform between a transmitter and a receiver if the C6678 has the same capability.
Best regards,
Daisuke